BU-48

BU-48

Identifiers
IUPAC name N-Cyclopropylmethyl-[7α,8α,2',3']-cyclohexano-1'[S]-hydroxy-6,14-endo-ethenotetrahydronororipavine
PubChem CID	10003114
ChemSpider	58178410
Chemical and physical data
Formula	C27H33NO4
Molar mass	435.554 g/mol g·mol−1
3D model (JSmol)	Interactive image
SMILES CO[C@]12C=C[C@@]3([C@H]4[C@@H]1[C@H](CCC4)O)[C@H]5Cc6ccc(c7c6[C@]3([C@H]2O7)CCN5CC8CC8)O
InChI InChI=1S/C27H33NO4/c1-31-27-10-9-25(17-3-2-4-18(29)22(17)27)20-13-16-7-8-19(30)23-21(16)26(25,24(27)32-23)11-12-28(20)14-15-5-6-15/h7-10,15,17-18,20,22,24,29-30H,2-6,11-14H2,1H3/t17-,18+,20-,22-,24-,25-,26+,27-/m1/s1 Key:LMFRYUPWVALVRA-QDFTYCMYSA-N
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BU-48 is a drug that is used in scientific research. It is from the oripavine family, related to better-known drugs such as etorphine and buprenorphine.

The parent compound from which BU-48 was derived (with N-methyl rather than methylcyclopropyl on the nitrogen and lacking the aliphatic hydroxyl group) is a powerful μ-opioid agonist 1000x more potent than morphine, but in contrast BU-48 has only weak analgesic effects and instead acts primarily as a δ-opioid agonist. Its main effects are to produce convulsions, but it may also have antidepressant effects.